The Navimow X390 is Segway's big-lawn flagship. It navigates by satellite with camera-based obstacle avoidance and runs for about four hours per charge.
What it does well
Long runtime: about 240 minutes per charge for large properties.
Taller cut: 2 to 4 inches suits thicker, longer grass.
Edge mode: runs the boundary to cut closer to edges.
The honest catch
It costs $1,700 more than the LUBA 3 AWD and has a narrower 9.3-inch cut. Without LiDAR, heavy tree cover can be harder for it.
Verdict
Worth it for large, open lawns where long runtime and edge cutting matter. For most yards, the LUBA 3 AWD is better value.